Toward a Biopsychosocial Ecology of the Human Microbiome, Brain-Gut Axis, and Health

Karl J. Maier, Mustafa Al'Absi

Research output: Contribution to journalReview articlepeer-review

20 Scopus citations


Objective Rapidly expanding insights into the human microbiome and health suggest that Western medicine is poised for significant evolution, or perhaps revolution - this while medicine continues on a trajectory from reductionism to a biopsychosocial (BPS) paradigm recognizing biological, psychological, and social influences on health. The apparent sensitivity of the microbiota to perturbations across BPS domains suggests that a broad and inclusive framework is needed to develop applicable knowledge in this emerging area. We outline an ecological framework of the human microbiome by extending the BPS concept to better incorporate environmental and human factors as members of a global, dynamic set of systems that interact over time. Methods We conducted a selective literature review across disciplines to integrate microbiome research into a BPS framework. Results The microbiome can be understood in terms of ecological systems encompassing BPS domains at four levels: (a) immediate (molecular, genetic, and neural processes), (b) proximal (physiology, emotion, social integration), (c) intermediate (built environments, behaviors, societal practices), and (d) distal (physical environments, attitudes, and broad cultural, economic, and political factors). The microbiota and host are thus understood in terms of their immediate interactions and the more distal physical and social arenas in which they participate. Conclusions A BPS ecological paradigm encourages replicable, generalizable, and interdisciplinary/transdisciplinary research and practices that take into account the vast influences on the human microbiome that may otherwise be overlooked or understood out of context. It also underscores the importance of sustainable bioenvironmental, psychological, and social systems that broadly support microbial, neural, and general health.

Original languageEnglish (US)
Pages (from-to)947-957
Number of pages11
JournalPsychosomatic medicine
Issue number8
StatePublished - Oct 1 2017

Bibliographical note

Publisher Copyright:
© 2017 by the American Psychosomatic Society.


  • antibiotic resistance
  • biopsychosocial
  • brain-gut axis
  • ecology
  • environment
  • microbiome
  • microbiota


Dive into the research topics of 'Toward a Biopsychosocial Ecology of the Human Microbiome, Brain-Gut Axis, and Health'. Together they form a unique fingerprint.

Cite this